High-quality replacement piston for 50cc original and 50cc Naraku cylinders for Minarelli 1E40QMB engines. Delivery as shown, including: piston rings, gudgeon pin and circlips. Special molybdenum coating for protecting the cylinder and piston during the run-in period. It is a good rule to change the piston in a 50cc 2-stroke engines after about 6,000 miles. This will help engine performance and reduce fuel consumption